US11092053B2 - Installation for depollution of exhaust gases, particularly of an internal-combustion engines, and method using such an installation - Google Patents

Installation for depollution of exhaust gases, particularly of an internal-combustion engines, and method using such an installation Download PDF

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US11092053B2
US11092053B2 US16/328,075 US201716328075A US11092053B2 US 11092053 B2 US11092053 B2 US 11092053B2 US 201716328075 A US201716328075 A US 201716328075A US 11092053 B2 US11092053 B2 US 11092053B2
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reducing agent
exhaust gas
additive
installation
additivation
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US20190178136A1 (en
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Stephane ZINOLA
Matthieu Lecompte
Stephane RAUX
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IFP Energies Nouvelles IFPEN
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IFP Energies Nouvelles IFPEN
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/90—Injecting reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9431—Processes characterised by a specific device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2896—Liquid catalyst carrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/25—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an ammonia generator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/01—Adding substances to exhaust gases the substance being catalytic material in liquid form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
    • F01N2900/1806—Properties of reducing agent or dosing system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
    • F01N3/106—Auxiliary oxidation catalysts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to an installation for depollution of exhaust gas, notably from internal-combustion engines, in particular for motor vehicles, and to a method using same.
  • Diesel type internal-combustion engine notably of a motor vehicle
  • spark-ignition engines such as those running on gaseous fuel or on gasoline, in particular those running lean.
  • exhaust gases from such engines contain many pollutants such as unburnt hydrocarbons (HC), carbon monoxide, nitrogen oxides (NO and NO 2 ), more commonly referred to as NOx, as well as particles.
  • pollutants such as unburnt hydrocarbons (HC), carbon monoxide, nitrogen oxides (NO and NO 2 ), more commonly referred to as NOx, as well as particles.
  • NOx emissions involve a major drawback as they have a harmful effect directly on human health, in particular NO 2 , and indirectly through the secondary formation of tropospheric ozone.
  • catalysis means such as an oxidation catalyst are arranged on the exhaust line.
  • a particulate filter is advantageously arranged on this line so as to capture and to eliminate the particles present in the exhaust gas, and thus to avoid discharging them to the atmosphere.
  • This filter needs to be periodically regenerated in order to prevent clogging, by achieving combustion of the particles retained in this filter.
  • These regeneration operations mainly consist in increasing the filter temperature, which may either occur spontaneously when using the engine at high load, or be generated by an exothermic oxidation, on a catalyst arranged upstream from the filter, of reducing chemical species resulting from the combustion or from an injection directly into the exhaust, triggered by the engine control.
  • a regeneration additive may be used to facilitate the regeneration phase.
  • An additive for regeneration of the particulate filter is understood to be any additive allowing to either promote the continuous particulate filter regeneration phenomenon and thus to space out the active particulate filter regeneration periods, or to accelerate combustion of the soot during the active particulate filter regeneration phases, thus allowing to limit the fuel consumption relative to this phase and/or to maximize the chances of burning a significant soot mass when the temperature conditions and the gas composition at the exhaust are favourable to this active regeneration, or a combination of these two advantages.
  • the exhaust gas also flows through other catalysis means, notably catalysts of SCR (Selective Catalytic Reduction) type.
  • SCR Selective Catalytic Reduction
  • This SCR catalyst allows to selectively reduce the NOx to nitrogen through the action of a reducing agent.
  • This reducing agent which is generally injected upstream from the SCR catalyst, can be ammonia or a compound generating ammonia by decomposition, such as urea, or a hydrocarbon, oxygenated or not, such as ethanol.
  • This ammonia is indirectly obtained by decomposition of a precursor injected in liquid form, generally a 32.5 mass % aqueous urea solution, better known under the brand name “AdBlue” in Europe.
  • the urea solution is injected into the exhaust line upstream from the SCR catalyst.
  • the water contained in this solution is rapidly vaporized under the effect of the exhaust gas temperature, then each urea molecule decomposes in two stages into two ammonia molecules.
  • the exhaust gas depollution system comprises an exhaust line including a depollution means that combines a particulate filter and a selective catalytic reduction (SCR) catalyst, possibly grouped into a single element referred to as SCR catalysed filter or SCRF filter, a single tank containing a mixture of an additive for particulate filter regeneration and of a reductant for elimination of the NOx present in this depollution means, and an injector for feeding this mixture upstream from the SCR catalyst or the SCRF filter.
  • SCR selective catalytic reduction
  • the system described in the aforementioned document is limited to the use of a single tank containing a mixture of an additive for particulate filter regeneration and of a reductant for NOx elimination, a mixture that is prepared outside the vehicle prior to being fed into the tank.
  • the present invention aims to overcome the aforementioned drawbacks by means of a method allowing an additive to be added to the reducing agent no longer outside the vehicle, but directly on board this vehicle.
  • the present invention thus relates to an installation for depollution of the exhaust gas circulating in an exhaust line, notably from an internal-combustion engine, comprising at least one catalysis means for selective catalytic reduction of nitrogen oxides, at least one particle elimination means, a main tank comprising at least one reducing agent and one or more means for feeding the reducing agent into the exhaust line, characterized in that the installation comprises reducing agent additivation means.
  • the additivation means can comprise an additivation circuit.
  • the additivation circuit can comprise at least one additivation tank connected to the main tank.
  • the additivation tank can contain at least one additive.
  • the additivation circuit can comprise at least one additive pumping and dosing means.
  • the additive can be a product facilitating the regeneration phase of the particle elimination means, or a product intended to improve spraying of the reducing agent, or a product allowing to limit or a product intended to lower the freezing point of the reducing agent, or a product intended to mask the smell of the reducing agent, or a combination of at least two of these products.
  • the reducing agent can contain ammonia or an ammonia precursor compound.
  • the reducing agent can be a hydrocarbon, oxygenated or not.
  • the invention also relates to a method for using the exhaust gas depollution installation described above, characterized in that it comprises:
  • the reducing agent can be additivated with at least one additive contained in at least one additivation tank.
  • the reducing agent can be additivated with at least one additive in solid form directly fed into the main tank.
  • the reducing agent can be additivated with at least one additive in liquid form directly fed into the main tank, more particularly through the neck of this tank.
  • the reducing agent can be additivated with at least one additive contained in a capsule to be perforated prior to being fed into the tank.
  • This exhaust gas depollution treating installation comprises an exhaust line 10 carrying exhaust gas from an internal-combustion engine 12 , of a motor vehicle for example.
  • the internal-combustion engine is understood to be a Diesel engine, but this does not rule out by any means all the other internal-combustion engines such as engines running on gasoline, gas or any other fuel.
  • exhaust line 10 comprises, in the direction of circulation of the exhaust gas from engine 12 to outlet 14 where it vents to open air, at least one means for capture and elimination of the particles present in the exhaust gas, as well as at least one means for reduction of the NOx also contained in this gas.
  • these means are combined in a single element better known as SCR catalysed filter or SCRF filter 16 .
  • this SCRF filter is arranged downstream from an oxidation catalyst 18 whose purpose is to treat the unburnt hydrocarbons and the carbon monoxide contained in the exhaust gas before the latter passes through the catalysed filter.
  • This oxidation catalyst is also to adjust the ratio between the nitrogen monoxide and the nitrogen dioxide contained in the exhaust gas in order to maximize the conversion efficiency of the SCR catalysis.
  • the exhaust line comprises a means for delivering a mixture of a reducing agent for NOx elimination and of an additive for particle regeneration.
  • This delivery means can come for example in form of an injector 20 arranged upstream from the SCRF filter.
  • a device 21 for homogenizing the reducing agent with the exhaust gas is positioned between the injector and the SCRF filter.
  • the exhaust line also comprises a means 22 for determining the differential pressure between the SCRF filter inlet and its outlet.
  • the exhaust line carries a temperature detector (not shown) arranged on the exhaust line, more specifically at the catalysed filter inlet, which allows to know at any time the temperature of the exhaust gas circulating in this line.
  • logic and/or computer means can be provided, which allow to estimate at any time the temperature of the exhaust gas circulating in the line.
  • This line can also comprise an NOx detector (not shown) arranged at the catalysed filter outlet, which allows to know at any time the amount of NOx flowing from this filter.
  • This line can also comprise an NOx detector (not shown) arranged at the catalysed filter inlet, which allows to know at any time the amount of NOx flowing into this filter.
  • an NOx detector not shown
  • logic and/or computer means can also be provided, which allow to estimate at any time these amounts of NOx.
  • the mixture fed into the exhaust line by injector 20 is carried through a pipe 24 connecting this injector to a main tank 26 containing this mixture.
  • the mixture is circulated between the main tank and the injector under the effect of a pumping means such as a pump 28 .
  • This main tank initially contains a reducing agent, ammonia or a compound generating ammonia by decomposition, such as urea.
  • this ammonia is indirectly obtained by decomposition of a precursor injected in liquid form into the exhaust line, generally a 32.5 mass % aqueous urea solution, better known under the brand name “AdBlue” in Europe.
  • reducing agent which covers the reducing agent as well as the precursor of this reducing agent, is used.
  • This additive can be a product that facilitates particulate filter regeneration, a product intended to improve spraying of the reducing agent, a product intended to lower the freezing point of the reducing agent, a product intended to mask the smell of the reducing agent, or a combination of at least two of these products.
  • the additive can contain a product facilitating particulate filter regeneration.
  • the additive can be a metal oxide.
  • the additive can be a combination of a product that facilitates regeneration of the particulate filter with at least one additive selected from among:
  • the additivation means and/or tank 26 can comprise a product allowing to limit or to suppress the formation of deposits from reducing agent decomposition byproducts.
  • This type of product can be an organic product.
  • tank 26 is connected to additivation means comprising an additivation circuit 30 .
  • This circuit comprises at least one additivation tank 32 that is connected to the main tank by an additivation pipe 34 .
  • an additive pumping and dosing means 36 such as a dosing pump, is provided on this pipe to send the additive from this additivation tank to the tank.
  • the additivation circuit can comprise an additivation tank with one or more additives as listed above or several additivation tanks containing each a different additive.
  • tank covers any fluid container, such as rigid containers or flexible pouches, in particular made of materials including synthetic or natural polymers.
  • additivation dosing pump 36 is actuated in order to feed, via additivation pipe 34 , the desired amount of additive(s) to the main tank, thus producing the mixture that will be sent into the exhaust line through the injector.
  • the amount of additive(s) to be added in the main tank is determined by the target additive concentration, which allows to obtain the desired effect by minimizing the amount of additive(s) supplied, both for economic reasons and to limit fouling or possible poisoning of the depollution system.
  • the main tank with any means, such as detectors, allowing to know, on the one hand, the reducing agent fill level and, on the other, the additive(s) fill level.
  • this tank requires much less frequent filling.
  • the additivation means comprise one or more additives in liquid or solid form directly fed into the main tank, more specifically through the neck of this tank.
  • additivation is achieved through perforation of a capsule containing one or more (solid or liquid) additives, so as to pour this or these additive(s) into the main tank containing the reducing agent, more specifically through the neck of this tank.
  • the present invention is not limited to the example described above, and it encompasses any other particle capture and elimination means and NOx reduction means embodiment.
  • the SCRF filter of the sole FIGURE which is made in one piece, can be replaced by at least two exhaust gas treatment means, with an SCR catalyst followed by a particulate filter.
  • injector 20 is arranged upstream from the SCR catalyst.
  • one of the means can be a particulate filter followed by a catalyst, the injector being arranged upstream from the particulate filter.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Toxicology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Materials Engineering (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Processes For Solid Components From Exhaust (AREA)
US16/328,075 2016-08-26 2017-07-11 Installation for depollution of exhaust gases, particularly of an internal-combustion engines, and method using such an installation Active US11092053B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR1657969 2016-08-26
FR1657969A FR3055220B1 (fr) 2016-08-26 2016-08-26 Installation pour la depollution des gaz d'echappement, notamment de moteur a combustion interne, et procede pour l'utilisation d'une telle installation
FR16/57.969 2016-08-26
PCT/EP2017/067356 WO2018036712A1 (fr) 2016-08-26 2017-07-11 Installation pour la depollution des gaz d'echappement, notamment de moteur a combustion interne, et procede pour l'utilisation d'une telle installation

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US20190178136A1 US20190178136A1 (en) 2019-06-13
US11092053B2 true US11092053B2 (en) 2021-08-17

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US (1) US11092053B2 (ko)
EP (1) EP3503993A1 (ko)
JP (1) JP7009450B2 (ko)
KR (1) KR102353657B1 (ko)
CN (1) CN109689185A (ko)
FR (1) FR3055220B1 (ko)
WO (1) WO2018036712A1 (ko)

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5813224A (en) * 1993-07-06 1998-09-29 Ford Global Technologies, Inc. Method and apparatus for reducing NOx in the exhaust streams of internal combustion engines
US20040231615A1 (en) * 2001-05-31 2004-11-25 Vincent Matthew William Process
DE102008034223A1 (de) 2008-07-23 2010-01-28 Bayerische Motoren Werke Aktiengesellschaft Reduktionsmitteltank zum Bereitstellen von Reduktionsmittel an einer Abgasanlage mit Absperrventil
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JP7009450B2 (ja) 2022-01-25
KR102353657B1 (ko) 2022-01-20
FR3055220A1 (fr) 2018-03-02
US20190178136A1 (en) 2019-06-13
EP3503993A1 (fr) 2019-07-03
CN109689185A (zh) 2019-04-26
KR20190039166A (ko) 2019-04-10
JP2019532208A (ja) 2019-11-07

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